bpf: move isAtLeastX to BpfUtils.h

Partially due to:
  https://android-review.googlesource.com/c/platform/bionic/+/3497280

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I74a626c45d641e226d7f71e00d0b542c5701417d
5 files changed